delimiter_token

delimiter_token 
      ::= 
      char_string_lit 
      | date_string 
      | time_string 
      | timestamp_string 
      | interval_string 
      | delimited_id 
      | sql_special_char 
      | not_equals_op 
      | greater_than_or_equals_op 
      | less_than_or_equals_op 
      | concatenation_op 
      | double_period 
      | "[" 
      | "]" 

This rule is called by

-> token